NOT EDIBLE: While technically not toxic, this fungus has no culinary value and is far too small and tough to be worthwhile. Historically not eaten in Western tradition. Some Cordyceps species are used in traditional Chinese medicine but this species is not commonly used. The rarity and ecological role make collection inappropriate. More valuable as an interesting ecological specimen showing fungus-on-fungus parasitism. The attachment to underground Elaphomyces truffle is distinctive and fascinating but not edible. Leave in place to observe this unique natural relationship.
Vegetable Caterpillar or Cordyceps Goldenthread is a fascinating parasitic fungus that attacks underground-dwelling fungi (false truffles, particularly Elaphomyces). The fruitbody consists of a long slender club or spike 3-12 cm tall and 0.5-1.5 cm wide, emerging from the soil. The club is cylindrical, often curved, yellow-brown to olive-brown, with a slightly roughened surface. The fertile upper portion is slightly enlarged. The club emerges from an underground fungal host (Elaphomyces) which appears as a dark ball connected to the base. When dug up, the black to brown host ball is visible attached.
| Family | Unknown |
|---|---|
| Genus | Tolypocladium |
| Edibility | Edible* |
| Toxicity | unknown |
| Season | Jul-Nov |
| Habitat | Found in mixed hardwood and coniferous forests, emerging from soil where the host fungus Elaphomyces grows underground. The host is mycorrhizal with tree roots. The club pushes up through soil, moss, and leaf litter. Fruits scattered, often inconspicuous. Common in moist forests with rich organic soil. |
| Region | Eastern North America (widespread), Pacific Northwest (common), Northern California, Rocky Mountains, Europe (widespread), Northern temperate forests worldwide |
Habitat: Found in mixed hardwood and coniferous forests, emerging from soil where the host fungus Elaphomyces grows underground. The host is mycorrhizal with tree roots. The club pushes up through soil, moss, and leaf litter. Fruits scattered, often inconspicuous. Common in moist forests with rich organic soil.
Region: Eastern North America (widespread), Pacific Northwest (common), Northern California, Rocky Mountains, Europe (widespread), Northern temperate forests worldwide
Summer through fall (July-November) in most regions. Peak fruiting in late summer and early fall (August-October). Can persist for weeks once emerged. More common in years with consistent moisture.
Typical months: Jul-Nov
Always verify identification to avoid these similar species. The differentiator is the point — learn the one or two tells that separate them:
parasitize insects not fungi, different substrate
club shape but larger, purple-tinged, not parasitic
dark brown to black, not on fungal hosts
antler-like, on wood not underground fungi
Pin the patch before you leave it. Coordinates, photos, and field notes stay on your device — and the offline lookalike guide travels with you into the deep woods.
Download Mushroom TrackerDisclaimer: This guide is for educational purposes only. Never consume a wild mushroom unless you are 100% certain of its identification.